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EQUITY INVESTMENTS - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 01, 2022
Apr. 01, 2022
Mar. 24, 2022
Nov. 30, 2022
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Sep. 06, 2022
Jan. 01, 2022
Net Investment Income [Line Items]                    
Gain on disposition of business         $ 0 $ 22,087        
Total cost method investments         193,576     $ 181,067    
Payments to acquire investments, total         $ 0 10,673        
Clearwave Fiber                    
Net Investment Income [Line Items]                    
Equity method investment, ownership percentage (in percent)                   58.00%
Equity method investments, fair value                   $ 440,000
Gain on disposition of business           $ 22,100        
MBI                    
Net Investment Income [Line Items]                    
Equity method investment, ownership percentage (in percent)         45.00%          
Equity method investment, difference between carrying amount and underlying equity         $ 496,400     497,800    
Point Broadband                    
Net Investment Income [Line Items]                    
Total cost method investments         42,623     30,373    
Payments to acquire investments, total     $ 5,400              
MetroNet                    
Net Investment Income [Line Items]                    
Total cost method investments         7,000     7,000    
Payments to acquire investments, total   $ 7,000                
Investment owned, at fair value   $ 7,000                
MetroNet | Maximum                    
Net Investment Income [Line Items]                    
Ownership Percentage (in percent)   10.00%                
Visionary                    
Net Investment Income [Line Items]                    
Total cost method investments         7,190     7,190    
Payments to acquire investments, total $ 7,200                  
Visionary | Maximum                    
Net Investment Income [Line Items]                    
Ownership Percentage (in percent) 10.00%                  
Ziply                    
Net Investment Income [Line Items]                    
Total cost method investments         $ 22,222     $ 22,222    
Payments to acquire investments, total       $ 22,200            
Ziply | Forecast                    
Net Investment Income [Line Items]                    
Payments to acquire investments, total             $ 27,800      
Ziply | Maximum                    
Net Investment Income [Line Items]                    
Total cost method investments                 $ 50,000  
Ownership Percentage (in percent)                 10.00%